{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421",
    "entityType": "User",
    "nonce": "0x00df49cf82903aff72a810457be3a126426c39f641d977cd21cab6dc7844b5f1",
    "signature": "0xcd89bad4031531d0416ae94bd2911327b7928b77d0a60c7cc0d5a4a77c62197e367e3413451c1b161bb42be50f6c6aef73fcb71ef451f0f74734e82feae9bed21c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}